The adsorption and oxidation of carbon monoxide at the Pt(111)/electrolyte interface: atomic structure and surface relaxation

Content Provider	Semantic Scholar
Author	Lucas, Chris Marković, Nenad M. Ross, Philip N.
Copyright Year	1999
Abstract	Using in-situ X-ray diVraction we have studied the adsorption of CO onto Pt(111) in pure perchloric acid. The adsorption of CO at an applied electrode potential of 0.05 V (versus the reversible hydrogen electrode) causes expansion of the topmost Pt atomic layer by ~4% of the bulk lattice spacing. At this potential the adsorbed CO forms a compressed p(2◊2) adlayer which fully covers the Pt surface. As the potential is stepped positively, the p(2◊2) structure undergoes an order‐disorder transition which appears to be triggered by oxidation of a small fraction of the adsorbed CO adlayer and is reversible or irreversible according to the overpressure of CO. © 1999 Elsevier Science B.V. All rights reserved.
File Format	PDF HTM / HTML
DOI	10.1016/S0039-6028(99)00252-6
Volume Number	425
Alternate Webpage(s)	http://www-ssrl.slac.stanford.edu/materialscatter/pubs/surface_sci_425_l381.pdf
Alternate Webpage(s)	https://doi.org/10.1016/S0039-6028%2899%2900252-6
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article